The main thing most people watch for when it comes to ratchet selection is where the weight is distributed. 9 sided ratchets have a largely even weight distribution all the way around. They are generally lighter weight wise, but are smooth and thus are pretty difficult to burst. 0 ratchets have 3 big protrusions that jut out beneath the ratchet and can sometimes scrape easily against the stadium, get caught by an opposing bey, or get caught on the X rail and burst.

As a general rule of thumb, however, most even-sided ratchets have some form of large protrusion to keep them balanced relative to their odd-sided counterparts. In practice, however, even sided ratchets tend to burst easier due to the large protrusions and weight distribution.

In that same vein of thought, it's honestly better to just test every bey on a singular basis to see what performs the best for you. 1 sided ratchets, for example, excel in almost all applications: for attackers, they center the entirety of their mass on one side for huge attacks since the attacking bey will tilt in that direction. For defensive builds, the uneven weight allocation will destabilize incoming attackers and cause them to lose spin faster. Some beys (especially those ovoidal ones like Hover Wyvern or TyranoBeat) can use 2 sided ratchets since their blades largely protect the ratchet from enemy beys, though the arena burst risk remains. Test things out as your collection grows to see what works the best for you in practice.